'''
data={}
data["姓名"]="zzj"
data["班级"]="1+3(1)"
data["学校"]="bdfzsjs"

data["姓名"]="zzh"
del data["姓名"]
print(data)
'''
'''
user_0 = {
'username': 'efermi',
'first': 'enrico',
'last': 'fermi',
}
for key, value in user_0.items():
    print("\nKey: " + key)
    print("Value: " + value)
'''